March 28, 2024
Zhangyuan Tungsten Industry has obtained an invention patent authorization: "A rare earth tungsten rod and its preparation method"
Zhangyuan Tungsten Industry has obtained an invention patent authorization: "A rare earth tungsten rod and its preparation method" Date: 2024-3-28 Source: Securities Star 0 Securities Star news, according to enterprise check data, Zhangyuan Tungsten Industry (002378) has recently obtained a new invention patent authorization, the patent name is "A rare earth tungsten rod and its preparation method", the patent application number is CN202410098979.4, and the authorization date is March 26, 2024. Patent abstract: This invention belongs to the field of powder metallurgy technology, specifically involving a rare earth tungsten rod and its preparation method. By pre-treating rare earth oxides in advance and controlling the moisture content of rare earth oxides, the strength of the tungsten rod blank can be improved, making it less likely to be damaged during handling and sintering, and having good formability. By dividing the moist rare earth oxides and tungsten into equal parts and using a multiple alternate mixing method for mixing, the invention avoids dead corners in the mixer and uneven mixing of rare earth oxide powders, improving the uniform distribution of rare earth oxides in the tungsten powder. The rare earth tungsten rod prepared by this invention has a density of 17.8-18.8g/cm3, a diameter of 20-22mm, a grain number of 3000-3600 in the radial section of the tungsten rod, a maximum difference in rare earth element content in different regions of less than 0.05%, and a porosity rate of less than 5%. Zhangyuan Tungsten Industry has obtained 13 patents since the beginning of this year, an increase of 30% compared to the same period last year. Combining with the company's financial data for the first half of 2023, the company invested 29.12 million yuan in research and development in the first half of 2023, an increase of 18.86% year-on-year.
